William de Beauchamp, 9th Earl of Warwick

William de Beauchamp, 9th Earl of Warwick (1237-1298) was an English nobleman who was Earl of Warwick from 1267 to 1298, succeeding William Maudit and preceding Guy de Beauchamp.

Biography
William de Beauchamp was the son of William de Beauchamp, and he succeeded his father as hereditary Sheriff of Worcestershire; he was also created "Earl of Warwick". William was a close friend of King Edward I of England, and he played a key role in his 1277 invasion of Wales, and he raised the siege of Conwy Castle in 1294. He was victorious in the 1295 Battle of Maes Moydog against the rebel Prince of Wales, Madog ap Llywelyn. At the end of his life, he campaigned against the Scots, and he died in 1298.